The VP71 is an auto on and auto looping HD video player (picture and audio files do not auto start on power up). Once you connect the player to a TV or monitor, simply load your video files on the enclosed SD card or USB drive and insert it into the player. The order in which the files are sorted on the card is the order in which they play . Once you load the card or drive, simply remove the power cord for a few seconds then reconnect the power. Your player will start play and continue to do so until power is turned off or the remote is used to stop or pause the video. The VP71 outputs 1 video source at a time and the default is HDMI out. If you are using VGA (40) or Composite video out (38), you can switch the video output by pressing the VGA (10) or CVBS (composite) (9) on the remote. The VP71 has 3 possible video outputs that can be activated individually. Composite video (38), HDMI (39) and VGA (40). Audio can be outputted with the 3.5mm jack on the back (41) with an included RCA cable (when using VGA or composite). The I/O port (42) is used to connect to our dry contact triggering board/harness or RS232 communication cable. View our Wave2Play proximity sensor to optimize the VP71 for Interactive Signage.